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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Chalk Aquifer (1)
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Europe
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Western Europe
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United Kingdom
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Great Britain
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England
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water resources (1)
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geologic age
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Cenozoic
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Tertiary
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Paleogene
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Eocene
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lower Eocene
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Ypresian
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London Clay (1)
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Mesozoic
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Cretaceous
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Upper Cretaceous (1)
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Primary terms
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Cenozoic
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Tertiary
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Paleogene
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Eocene
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lower Eocene
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Ypresian
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London Clay (1)
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Europe
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Western Europe
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United Kingdom
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Great Britain
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England
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Essex England (1)
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geothermal energy (1)
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ground water (1)
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Mesozoic
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sedimentary rocks
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chalk (1)
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water resources (1)
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sedimentary rocks
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sedimentary rocks
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carbonate rocks
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chalk (1)
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chemically precipitated rocks
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flint (1)
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clastic rocks
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marl (1)
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Colchester Northern Gateway Project
Evaluation of measures to improve the performance of an open loop ground source heat pump system in the chalk aquifer: a case study
SEG Discovery 124 (January)
Abstract Thin-section analysis of chalk tesserae obtained from two Roman mosaics in Caerleon (South Wales) identifies foraminifera of a Late Cretaceous (Campanian) biostratigraphic age. The mosaics from which the tesserae originated were laid either in or close to the legionary fortress built at Caerleon by the Romans in AD 74–75. The Backhall Street mosaic formed part of the Baths complex of the fortress and is dated to the AD 80s; the August Villa Garden tesserae were found close to Barrack Buildings IX and X of the fortress and may have been laid about AD 200. Chalk Group outcrops are not found close to Caerleon, so the chalk used in both instances must have been transported to the site. The foraminiferal analyses suggest a possible source in the Dorset area. A transport route from Dorset to the legionary fortress at Caerleon via ports at either Crandon Bridge or Sea Mills on the Severn estuary is suggested.